Controller: Users.php:

<?php
session_start();
class Users extends CI_Controller
{

    public function viewinsert1()
    {

        $this->load->view('createfinal');
    }

    public function viewinsert2()
    {

        $this->load->library('form_validation');
        $this->form_validation->set_rules('email', 'email', 'trim|required|valid_email|xss_clean');
        $this->load->view('personalfinal');
    }

    public function viewinsert3()
    {

        $this->load->view('socialfinal');
    }

    public function viewupdate()
    {

        $this->load->view('view_update');
    }

    public function viewdelete()
    {

        $this->load->view('view_delete');
    }

    public function show()
    {
        // $this->load->model('user_model');
        $data['results'] = $this->user_model->get_users();


        $this->load->view('user_view', $data);

        // foreach ($result as $object)
        // {
        //  echo $object->id . "</br>";
        // }
    }

    // public function insert()
    // {

    //  $username = "Peter";
    //  $password = "12345";
    //  $this->user_model->create_users([
    //      'username' => $username,
    //      'password' => $password
    //      ]);
    // }

    public function insert()
    {
        // echo $this->input->post('password') . "</br>";
        // echo $_POST['username'];


        //echo $email = $this->input->post('email');
        //echo $_SESSION["email"];
        // $email  = $this->input->post('email');


        // $_SESSION["email"] = $email;
        // $_SESSION["pass"] = $pass;
        // $_SESSION["cpass"] = $cpass;
        // $_SESSION["fname"] = $fname;
        // $_SESSION["lname"] = $lname;
        // $_SESSION["phone"] = $phone;
        // $_SESSION["address"] = $address;
        $this->load->library('form_validation');
        $this->form_validation->set_rules('email', 'email', 'trim|required|valid_email|xss_clean');
        $this->form_validation->set_rules('fname', 'firstname', 'trim|alpha|required|xss_clean');
        $this->form_validation->set_rules('lname', 'lastname', 'trim|alpha|required|xss_clean');
        $this->form_validation->set_rules('phone', 'phone', 'trim|numeric|required|integer|exact_length[10]');
        $this->form_validation->set_rules('address', 'address', 'trim|alpha_dash|required');
        $this->form_validation->set_rules('pass', 'cpass', 'trim|required|matches[cpass]|md5');
        $this->form_validation->set_rules('pass', 'cpass', 'trim|required');

        if ($this->form_validation->run() == FALSE)
        {
            $this->load->view('createfinal');
            echo "Error";
        }

        else
        {
            $data = array(
                    'email' => $_SESSION["email"],
                    'firstname' => $_SESSION["fname"],
                    'lastname' => $_SESSION["lname"],
                    'phone' => $_SESSION["phone"],
                    'address' => $_SESSION["address"],
                    'twitter' => $this->input->post('twitter'),
                    'facebook' => $this->input->post('facebook'),
                    'googleplus' => $this->input->post('gplus'),
                    'password' => $_SESSION["pass"],
                    'confirm' => $_SESSION["cpass"],
                    );

        // echo var_dump($data);


        $result = $this->user_model->create_users($data);

        $this->load->view('createfinal');

        echo "<h1>The data has been inserted</h1>";
        }
    }

    public function update()
    {

        if (isset($_POST['update']))
        {

            $id = $this->input->post('id');
            $data = array(
                    'username' => $this->input->post('username'),
                    'password' => $this->input->post('password')
                          );

            $this->user_model->update_users($data, $id);

            echo "<h1> Data is updated successfully:) </h1>";
            $this->load->view('view_update');
        }
        else
        {

            echo "Oops! There is something wrong!";
        }

    }

    public function delete()
    {

        if (isset($_POST['delete']))
        {

            $id = $this->input->post('id');
            $this->user_model->delete_users($id);

            echo "<h1>The data has been deleted.</h1>";

        }
        else
        {

            echo "<h3>No Such data exist!</h3>";
        }

    }
}
?>

and here is the view that i wanna load..

createfinal.php:


<!DOCTYPE html>
<html>

<head>
    <title>Login Form</title>
    <link rel="stylesheet" type="text/css" href="<?php echo base_url();?>css/style.css">
</head>
<body>
<!-- multistep form -->
<form id="msform" action="viewinsert2" method="post">
    <!-- progressbar -->
    <ul id="progressbar">
        <li class="active">Account Setup</li>
        <li>Social Profiles</li>
        <li>Personal Details</li>
    </ul>
    <!-- fieldsets -->
    <fieldset>
        <h2 class="fs-title">Create your account</h2>
        <h3 class="fs-subtitle">This is step 1</h3>
        <input type="text" name="email" placeholder="Email" />
        <input type="password" name="pass" placeholder="Password" />
        <input type="password" name="cpass" placeholder="Confirm Password" />
        <input type="submit" name="next" class="next action-button" value="Next" />
    </fieldset>


</body>
</html>

The css folder is parallel to the application folder. Please help Me!